[Stable and Immobile] - The new design and upgrade of the assembly reduces the number of connection points. The connection hole with strong magnetic , 0.4inch wide tail diameter and 0.2inch deep groove make the operation more stable and not easy to fall off. [Precision Forging]- Dozens of tests and experiments have been carried out on the basis of the components to solve better compatibility, while to surpass the functions. [High hardness and wear resistance] - The positioning pin and are made of high-quality chrome-vanadium alloy steel, with a hardness of up to 60HRC, wear-resistant and corrosion-resistant, bright as new, and never rusted. [All-round application]- The replacement is compatible with conversion heads such as hexagonal , hole saw, drill bit, socket, etc., to meet the needs of drilling, screwing, wrench and other scenarios, and it is more powerful than the version. [Perfect Gift]-If you have someone around you who likes crafting or DIY, you will help free his hands with minimal cost, and the time-saving function will make people scream and . Colour:Iron-gray Material:Chrome vanadium alloy Package Contents: 2 x Impact Driver Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.